The 992 GT3 will have to go Turbo to keep up.  I don't think the 992 GT3 (if non-turbo) will sell as well if both the 992 CS and 992 GTS are much faster on both road and track.

Will the "Pure Driving Experience" of an NA 992 GT3 be enough of a selling point if it is the slowest model in the 992 range ??